EiioX Bamboo Wood Grain Blue LED Alarm Clock- Time Temperature Date & Sound Control-Latest Generation Desktop Digital Wood Alarm Clock Fashionable Digital Alarm Wooden Clock for office & bedroom, perfect as a special present. Built-in Li-ion batteries make clock work in case of power failure. No sound of  tick-tock as the old clocks. Sound control function: Clap your hands to control the clock Power supply : Powered by 3AA batteries or USB cable